working on desktop but not phone

I also just confirmed that it isn’t working on iOS either. However, I do have another site that I use it on that works, so I’m not sure what I’m doing wrong.

I’ve just tested it using an iPhone 4S w/iOS 7 and the Xcode iOS simulator and it’s properly resizing videos in the demo, so there must be something unique about your setup:

https://www.dropbox.com/s/j1omnlr6gq8q78n/iOS-Video-Test-1.2.1.png
https://www.kevinleary.net/responsive-video-embeds-plugin-example/

Can you provide more details about the specifics of how the video is being included in your site?

1. Are you using the [embed] shortcode or the auto-embed (oEmbed) feature?
2. Are the videos embedded using the main editor, or are you using another method in your theme?